Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e51d1b5b379a6a…

MALICIOUS

PDF

46.2 KB Created: 2020-08-28 04:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37aa8e3809075ba93d4e02afcdcd8955 SHA-1: 877dd98373c4c1547af8b1efb9e3ac34e3864b82 SHA-256: 30e51d1b5b379a6a6275aefd1f7719a545936880b2498347cc45664bd8a21094
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a specific redirector URL, indicating a malicious redirection attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary redirector. The presence of a 'download button' lure suggests the intent is to trick the user into clicking the link, likely to download a secondary payload or navigate to a phishing site.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=abc+pattern+worksheet
    • http://files.mountedup.com/uploads/1/3/1/6/131636719/8002577.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/arte_bizantino_libro.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/25933186695.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/osrs_red_chinchompa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/xutosigowebopunexutodemi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3967/8886/files/keto_menu_plan_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/lejile.pdf
    • https://cdn.shopify.com/s/files/1/0435/6407/3128/files/35776563370.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/xufulokaxapogimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/16493559765.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/titipazenarupeboxef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/tinileluxuwafiguvagipuzu.pdf
    • https://cdn.shopify.com/s/files/1/0457/4576/6556/files/medimigivorelesavenag.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008495.bin
158b95ff1bf521b05af9b88e4909ca1faeca62a8c0d6ebddcf6717a4376539ec
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8495 17196 bytes
font_00_sfnt_off00005176.bin
8b0ca34ec7633636bb9632e4da9fab97273e9a3ae0adce41486b1194938bdce7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5176 5016 bytes
font_01_sfnt_off00006275.bin
d247550f5f73f88813382ba4683f33345e6960db93d21744e672b3b9134d28cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 9888 bytes
font_03_sfnt_off00009dbe.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DBE 4324 bytes